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Pumping Test Conditions <br />Footprint of Total Area of Disturbance = 27,455 ft2 (0.630 acre) <br />20' ZONE OF DISTURBANCE <br />FROM MACHINERY <br />I B - I I <br />I <br />--J <br />187' I <br />I <br />I _ <br />3 _ <br />w <br />I g <br />I 85 g $ <br />o ?_S <br />I N mN Q <br />K <br />I m <br />I <br />I <br />175' <br />APPROXIMATE DIMENSIONS <br />EXCAVATED TOPSOIL <br />PILE AT 10' HIGH <br />I- APPROXIMATE DIMENSIONS <br />SUBSOIL BERM AT 5Y2' HIGH <br />A <br />I <br />I <br />I <br />I <br />52' I <br />I <br />I _ <br />I <br />I - <br />I <br />I I <br />A <br />Pumping test discharge = 20 gallons/minute <br />Test duration = 6 days <br />Total capacity required = 172,800 gallons <br />Minimum freeboard = 2 feet <br />Storage Pit Volume Calculations <br />Pit depth = 8 feet <br />Pit volume at 8 foot depth = 190,384 gallons <br />Volume with 2 foot freeboard = 279,272 gallons <br />2:1 (Horiz:Vert) slope, all sides <br />Excavated topsoil volume = 9,418 ft' (349 yard') <br />Excavated subsoil volume = 25,450 ft' (943 yard' <br />Excavated topsoil pile height = 10 feet <br />Excavated subsoil berm height = 5Y2 feet <br />Footprint Area Calculations <br />Total area of disturbance = 27,455 ft2 (0.630 acre) <br />Excavated topsoil footprint = 2,350 ft2 (0.054 acre) <br />Storage pit footprint = 5,304 ft2 (0.122 acre) <br />Storage pit + berm footprint = 11,475 ft2 (0.263 acre) <br />BERM = 5}4• SUBSOIL BERM <br />PIT = 8' STORAGE PIT <br />Section A-A <br />Storage Pit and Berm <br />PILE = 10' TOPSOIL PILE <br />Section B-B <br />Excavated Topsoil Pile <br />Attachment C <br />Off Channel Water <br />Infiltration Pit Design POWERTECN (USA) INC. <br />DRAWN S. Hetrick PROJECT Centennial DATE 27-Feb-2009 <br />CHECKED M. Beshore COORDS NAD 27 -Colorado State Plane South PLOT DATE F -Feb-2009 <br />SCALE 1" = 40' FILENAME p:\centennial\maps\waterpit.dwg REF 157 <br />I- 135' <br />L-----------------